Invited Paper 2D+EM+MI+NS-TuA9
Unraveling the Novel Quantum Phenomena in Two-dimensional Materials using Transport and Photoemission Spectroscopy
Tuesday, October 22, 2019, 5:00 pm, Room A216
The extreme surface sensitivity of two-dimensional (2D) materials provides an unprecedented opportunity to engineer the physical properties of these materials via changes to their surroundings, including substrate, adsorbates, defects, etc. In addition, 2D materials can be mechanically assembled layer-by-layer to form vertical or lateral heterostructures, making it possible to create new material properties merely by the choice of the constituting 2D layers and the relative twist angle between them. In this talk, I will discuss our recent transport [1] and photoemission [2, 3] results that shed light on the intricate relationship between controlled external perturbations, substrate, and electronic properties of 2D materials. I will show that the decoration of the 2D materials with adatoms, such as sub-lattice selective atomic hydrogenation of graphene and alkali metal doping of single layer WS2 can be utilized to tailor electronic properties and induce novel quantum phenomena in 2D landscape.
[1] Katoch et. al., Physical Review Letters 121, 136801 (2018).
[2] Katoch et. al., Nature Physics 14, 355-359 (2018).
[3] Søren Ulstrup, et. al., arXiv:1904.06681 (2019).